package com.xuenci.gulimall.auth.controller;/*
 *@author:xec
 *@date:2022/5/21  17:32
 */

import com.alibaba.fastjson.TypeReference;
import com.alibaba.nacos.client.utils.StringUtils;
import com.xuenci.common.constant.AuthServerConstant;
import com.xuenci.common.exception.BizCodeEnume;
import com.xuenci.common.utils.R;
import com.xuenci.common.vo.MemberRespVo;
import com.xuenci.gulimall.auth.feign.MemberFeignService;
import com.xuenci.gulimall.auth.feign.ThirdPartFeignService;
import com.xuenci.gulimall.auth.vo.UserLoginVo;
import com.xuenci.gulimall.auth.vo.UserRegistVo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

@Controller
public class LoginController {

        @Autowired
        ThirdPartFeignService thirdPartFeignService;

        @Autowired
        StringRedisTemplate redisTemplate;

        @Autowired
        MemberFeignService memberFeignService;
        /**
         * 发送一个请求直接跳转到一个页面。
         * springMVC viewcontroller
         *
         */

        @ResponseBody
        @GetMapping("/sms/sendcode")
        public R sendCode(@RequestParam("phone") String phone){
            // TODO 1、接口防刷。
            String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);
            if (!StringUtils.isEmpty(redisCode)){
                long l = Long.parseLong(redisCode.split("_")[1]);
                if (System.currentTimeMillis() - l< 60000){
                    // 60秒内不能再发
                    return R.error(BizCodeEnume.SMS_CODE_EXCEPTION.getCode(),BizCodeEnume.SMS_CODE_EXCEPTION.getMsg());
                }
            }
//            System.out.println("aa");

            // 2、验证码的再次校验。redis,存key-phone，value-code     sms:code:18173079617  ->   123123(验证码)
            String code = UUID.randomUUID().toString().substring(0, 5);
            String substring =code +"_"+System.currentTimeMillis();

            // redis缓存验证码,防止同一个手机号在60秒内再次发送验证码
            redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX+phone,substring,5, TimeUnit.MINUTES);

            thirdPartFeignService.sendCode(phone,code);
            return R.ok();
        }

    /**
     * 重定向携带数据，利用session原理，将原数据放在session中华。
     * 只要跳到下一个页面去除这个数据后，session里面的数据就会删掉
     * // TODO 分布式下的session问题
     * RedirectAttributes redirectAttributes：重定向携带数据
     * @param vo
     * @param result
     * @param redirectAttributes
     * @return
     */
        @PostMapping("/regist")
        public String regist(@Valid UserRegistVo vo, BindingResult result,
                             RedirectAttributes redirectAttributes){
            if (result.hasErrors()){

                /**
                 *                  .map(fieldError -> {
                 *                     String feild = fieldError.getField();
                 *                     String defaultMessage = fieldError.getDefaultMessage();
                 *                     errors.put(feild,defaultMessage);
                 *                     return errors;
                 *                 })
                 */
                Map<String, String> errors = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));

//                model.addAttribute("errors",errors);
                redirectAttributes.addFlashAttribute("errors",errors);
                // 校验出错，转发到注册页
                return "redirect:http://auth.gulimall.com/reg.html";
            }
            // 调用远程服务
            String code = vo.getCode();
            String s = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
            if (!StringUtils.isEmpty(s)){
                if (code.equals(s.split("_")[0])){
                    // 删除验证码。 令牌机制
                    redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());
                    // 验证码通过。 真正注册。调用远程服务进行注解
                    R r = memberFeignService.regist(vo);
                    if (r.getCode()==0){
                        // 成功

                        return "redirect:http://auth.gulimall.com/login.html";
                    }else {
                        Map<String, String> errors = new HashMap<>();
                        errors.put("msg",r.getData("meg",new TypeReference<String>(){}));
                        redirectAttributes.addFlashAttribute("errors",errors);
                        return "redirect:http://auth.gulimall.com/reg.html";
                    }

                }else {
                    Map<String,String> errors = new HashMap<>();
                    errors.put("code","验证码错误");
                    redirectAttributes.addFlashAttribute("errors",errors);
                    return "redirect:http://auth.gulimall.com/reg.html";
                }
            }else {
                Map<String,String> errors = new HashMap<>();
                errors.put("code","验证码错误");
                redirectAttributes.addFlashAttribute("errors",errors);
                return "redirect:http://auth.gulimall.com/reg.html";
            }
        }

        @GetMapping("/login.html")
        public String loginPage(HttpSession session){
            Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
            if (attribute ==null){
                return "login";
            }else {
                return "redirect:http://gulimall.com";
            }
        }

        @PostMapping("/login")
        public String login(UserLoginVo vo, RedirectAttributes redirectAttributes,
                            HttpSession session){

            // 远程登录
            R login = memberFeignService.login(vo);
            if (login.getCode()==0){
                MemberRespVo data = login.getData("data", new TypeReference<MemberRespVo>() {
                });
                // 成功放到session中
                session.setAttribute(AuthServerConstant.LOGIN_USER,data);
                return "redirect:http://gulimall.com";
            } else{
                Map<String,String> errors = new HashMap<>();
                errors.put("msg",login.getData("msg",new TypeReference<String>(){}));
                redirectAttributes.addFlashAttribute("errors",errors);
                return "redirect:http://auth.gulimall.com/login.html";
            }


        }

}
